[wsgi] add the simplest possible wsgi (debug) server This server is able to: * serve on a given port using the stdlib SimpleHTTPServer * run looping tasks Closes #3005509.

etc/init.d
etc/cubicweb.d
etc/bash_completion.d
usr/bin
usr/share/doc/cubicweb-ctl
var/log/cubicweb
var/lib/cubicweb/backup
var/lib/cubicweb/instances